Heating pad



FIG. 1 is a front side view of the heating pad showing my novel design;

FIG. 2 is a back side view of the heating pad;

FIG. 3 is a right side elevation view of the heating pad;

FIG. 4 is a left side elevation view of the heating pad;

FIG. 5 is a top plan view of the heating pad; and,

FIG. 6 is a bottom plan view of the heating pad. 

The ornamental design for a heating pad, as shown and described. 